First:8/10 needs work on the text on the top nice bg and render tho Second: needs work on the lighting very nice text tho 8/10
6/10. you should try to fill out the sig more. if u used c4d or something, add some saturation to it to bring out more colour. try making the stock actually look like it comes from the sig, and not just pasted there.
first 7/10 <--- i love the background but im not to keen on that style of render, might just be a matter of taste though second 8.5/10 <---- loving the blending techniques but i feel it gets maybe a tiny bit bland towards the edges. There both awseome though